Product specifications

CDM-710 Broadcast Satellite Modem Revision 11
Introduction MN/CDM710.IOM
1–15
1.4.1 Environmental and Physical
Description Requirements
Temperature
Operating
0 to 50ºC (32 to 122ºF)
Storage
-20 to 70ºC (-4 to 158ºF)
Humidity
Operating
95% maximum, non-condensing
Storage
99% maximum, non-condensing
Power Supply Input
AC 100-240V AC 50/60Hz, auto-ranging
DC -48 VDC
Fuse
AC T2.00A 5x20 mm 250VAC time lag
DC T6.25A, 6.3x32mm (3AG), 250VAC time lag
Power Consumption < 75 W, 55W typical
AC Power Cord Retainer Standard
Modular design Simplex or Duplex
Dimensional Envelope, 1RU
1.72H x 19.00W x 18.65D inches
(4.37H x 48.26W x 47.37D cm)
Weight 15lbs (6.8 kg)
Front Panel
Operational
Features
Keypad Up, down, left, right, Clear, and Enter keys
Display 24-characters/line x 2 lines Vacuum Fluorescent Display (VFD)
LEDs 8 status LEDs
1.4.2 Modulator
1.4.2.1 CDM-710 (70/140 MHz)
Modulator
Description Requirements
Frequency 52 to 88 MHz or 104 to 176 MHz in 100 Hz steps. Bandwidth of transmitted
spectrum is within IF frequency range.
Impedance
75Ω or 50
Ω
, programmable
Connector BNC Female
Return Loss 18 dB
Output Power 0 to -20 dBm in 0.1 dB steps.
Carrier is not interrupted when changing between output power levels or
removing data connections.
Output Power Accuracy
± 0.5 dB at 25°C
Output Power Stability
Within
±
0.5 dB of 25C value over all specified environments
Carrier Mute 55 dB below main carrier output
Harmonics and Spurious -55 dBc/4 kHz over operating frequency range (excludes spectral mask area)
and is with a modulated carrier.
-55 dBc/4 kHz 10 to 52 MHz, 176 to 250 MHz
Integrated Phase Noise Continuous component < 1 degrees RMS double-sided, 100 Hz to 10 MHz
Spectral Inversion Normal or Inverted
Quadrature Phase Error
< 2°
Quadrature Amplitude Imbalance 0.2 dB maximum
Carrier Null 35 dB below an unmodulated carrier
Combined Amplitude Imbalance
and Quadrature Phase Error
Single sideband test with suppressed sideband 35 dB minimum below
unmodulated carrier